Will this work?

By MNPyro Date 04-11-2005 18:59

Ok, so I am ordering a steel cylinder(1045 CR) and I want to know which will be better to weld to it, A36 HR or 1018 CR, I was told it doesn't make a difference, but I know different metals have different properties. I am not that knowledgeable in this field and so any suggestions would help. Thank you

By G.S.Crisi (****)

Date 04-11-2005 20:49

If by 1045 CR, A36 HR and 1018 CR you mean, respectively, SAE 1045, ASTM A-36 and SAE 1018 steels, the situation is the following:
SAE 1045 is a medium carbon steel. It contains 0.45 % nominal carbon.
ASTM A-36 is a low carbon steel. It contains 0.30 % maximum carbon.
SAE 1018 is a low carbon steel. It contains 0.18 % nominal carbon.
So, you can weld either A-36 or 1018 to 1045 with no significant difference.
1045, however, is a medium carbon steel and so you should take the usual precautions when welding this kind of steel.
I'm just curious. What will be that cylinder for? What are the items made of A-36 and/or 1018 you want to weld to it?
If it's a confidential information, never mind, forget it.
Giovanni S. Crisi
Sao Paulo - Brazil

By MNPyro Date 04-11-2005 21:31

Thank you for replying.
The cylinder will have a 4 inch deep and 1 inch diamter hole drilled down it (which is the SAE 1045) attached to the other side(non hole) is a steel plate(A36) in which is called a Concussion Mortar, its a Pyrotechnic special effect "object"
No confidentiality needed :-)
Thanks again Giovanni